Grading or separating machine.



S. MARSHALL. GRADING 0R SEPARATING MACHINE.

APPLICATION nuzn SEPT-1.1916.

1,228,800., Patented June 5, 1917.

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s. MARSHALL.

GRADING 0R SEPARATING MACHINE. APPLICATION FILED sEP T. 1. 1916.

Patented June 5, 1917.

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GRADING OR SEPARATING MACHINE.

Specification of Letters Patent.

Patented June 5, 1917.

Application filed September 1, 1916. Serial No. 118,140.

To all whom it may concern:

Be it known that I, SYLvns'rER MARSHALL, a citizen of the United States,residing at Athens, in the county of Athens and State of Ohio, haveinvented certain new and use ful Improvements in Grading or SeparatingMachines, of which the following is a specification.

My invention relates to a grader or separator such as shown in my Patent1,198,395, dated September 12, 1916.

The objects of the invention are to increase the capacity of themachine, shown and described by providing a cylindrical screen extendingup from the flat sieve or screen parallel with the inner side of theouter rim and spaced therefrom; to provide an improved manually actuateddischarge mechanism; to simplify the prior construction by avoiding thenecessity for an adjusting mechanism for the sieve or screen and toprovide the base or tripod with a novel means for supporting a bag underthe outlet for the perfect material or seed grain.

These objects I accomplish by the construction shown in the accompanyingdrawings,'in which:

Figure 1 is a sectional perspective of a machine containing myimprovements;

Fig. 2 is a sectional side elevation thereof;

Fig. 3 is a sectional plan view; and

Fig. 4 is a perspective of the base or tripod forming the support forthe screens and bags to be filled.

Fig. 5 is a detail view showing the curved valve plate and a cooperatingbucket upon an enlarged scale.

A, designates the base or support in the form of a tripod terminating atits upper end in a three armed head a to the arms of which the upperends of the side bars a are secured by bolts a; the lower ends of theside bars a being connected by the triangularly arranged base bars aFrom the head a projects, at an angle of 45, a fixed tubular bearing oraxis at a.

B, designates three bag holding fingers pointed at their upper ends andprojecting upwardly from the three arms of the head a to which they aresecured by the bolts a D, D, designate the two fiat screens or sieves,which, as in my aforesaid application, are of a mesh or have openingslarge enough to permit the passage of the grains having the greatesttransverse diameter, in the mass of grain to be treated. These screensor sieves are surrounded by imperforate rims d, to the lower edges ofwhich are secured the imperforate bottoms d. The upper edges of the rimsd, are provided with inturned or inwardly projecting annular flangescl".

Within the outer imperforate rims d par allel therewith and spacedtherefrom, are the cylindrical screens D secured at their lower edges tothe flat sieves or screens D, D, respectively. These cylindrical screensor sieves D also have their openings large enough to permit the passageof the grains having the greatest transverse diameter in the mass ofgrain to be treated, and their addition to the machine greatly increasesthe output. Cylindrical screens with flat screen bottoms are in factformed by this construction.

E, designates a cylindrical block with crossed recesses in its top inwhich lie the transverse arms F of the spider-like frame F which carriesthe two sieves D, D; said frame having arms f extending along the screenrims-d to which they are securely fastened by screws f or in any othersuitable manner.

G, designates the outlet tube for the largest grains separated out. Thistube is secured at its upper end to the cylindrical block E, and extendsdown through the centers of both screens D, D, and their false bottomsd. The tube G, has openings g, g in one side at about the level of thescreens D, D. Within the tube G, is a central spindle H, secured at itsupper end to the block E, and extending into the tubular bearing a onwhich it rotates. The lower or outlet end of the tube Gr, extends downbetween the three bag holding fingers B, so as to discharge the selectedgrain into a bag held on said fingers. I

J, J, designate curved plate valves mounted ona common shaft J to openand close the openings g, g in the tube G.

K, K, designate two buckets or gates mounted on a common shaft is, onefor each screen. These buckets or gates K, K are secured at their rearsides between their inner and outer edges to the said shaft is and whenin their operative position extend from the cylindrical screens D D tothe outlet tube G where they register with the flanges g on the rearedges of the openings g, g to direct the perfect grain into saidopenings. In this position the rear sides of the outer edges of thebuckets or gates their operative position; the spring being placed undertension by means of a handle secured to the upper end of shaft 70 andadapted to snap under-a spring catch 70 secured at the base of thehandle A* by means of which the screens are rotated. This spring catch70 has a finger piece 76 by means of which it may be lifted out of en--gagement with the handle 7% whenever the buckets or gates K, K are tobe thrown into operative position.

The spaces between the flat screens D, D, and their imperforate falsebottoms d, are connected by a discharge chute L; the rims (5 havingopenings leading into chute L, as shown at Z. The lower screen D, is fedby means of a spout (Z while the grain is poured directly into the upperscreen.

It will be seen that the cylindrical screens D are at right angles tothe flat screens D, D, so that an angular space will be formed at thelower portion into which the grain will fall, and from which it will belifted when the screens are rotated. To assist in lifting and stirringthe grain as the screens are rotated, I provide the cylindrical screens,at points opposite to the cleats 7a, with angle pieces M forming liftersor stirrers.

The machine is only intended for grading or separating the largestgrains for seeding purposes and'so the openings in the screens are madelarge enough to let all of the grain fall through, but owing to theinclination of the screens the largest grains will slide down across theopenings while the smaller inferior grains will pass rapidly through thescreens. The smaller inferior grain, cockle, cheat and the like comprisefrom 30% to 50% of the grain from which the seed is to be separated.

The sieves being supplied with grain, the buckets or gates K, K, beingswung to their inoperative positions and the valves J, J being closed,the sieves are slowly rotated to thereby carry the mass of grain. up theinclined surface of the screens D, D, and up the cylindrical screens DAs the grain is carried up it will begin to slide down the screens andthe smaller inferior grains will rapidly fall through upon theimperforate false bottoms (Z and pass to the chute L and out of thelower open end thereof. The largest grains remaining will then beremoved by releasing the catch 70 and thereby permitting the spring 713to throw the buckets or, gates K, K across the gnnular space betweentube G and the cylindrical screens D and in so doing also open thevalves J, J. By now turning the screens, the mass of large grainswill'be lifted by the buckets or gates K, K and discharged into thecentral outlet tube. The buckets or gates and the valves will then beset for another operation.

The addition of the screens D greatly increases the capacity of themachine as will be readily appreciated. The number of revolutions giventhe screens to obtain the seed grain will depend upon the foulness ofthe mass of grain, but the grading is rapidly done in anyevent, owing tothe openings be: ing larger than the greatest transverse diameter of thelargest grains.

What I claim is:

1. A grader or separator comprising, an inclined rotary screen or sieveformed of a circular rim, a flat reticulated bottom, and a cylindricalscreen within and spaced from the said rim and secured at its lower edgeto the said reticulated bottom; the openings in the said reticulatedbottom and cylindrical screen being larger than the greatest transversediameter of. the largest grains, an outlet being provided through therimbetween the reticulated and imperforate bottoms, and independentmeans for discharging the largest grains from above the reticulatedbottom.

2. Agrader or separator comprising, a suitable base or support, a rotaryinclined fiat screen or sieve mounted centrally thereon and providedwith an axially arranged outlet, a valve controlling said outlet andaseparate and independent bucket or gate operatively connected at itsinner end to said valve to open and close the same and adapted to openthe valve, lift the graded material and discharge it directly into saidoutlet. 1

3. A grader orseparator comprising, a suitable base or support, a rotaryinclined fiat sieve mounted centrally thereon and having an imperforaterim, a cylindrical, screen extending up from the flat screen at rightangles thereto and spaced from the said rim, an imperforate bottom belowthe flat screen having a discharge outlet, an axially arranged outlettube extending through the said imperforate bottom and fiat screen andhaving an opening in one side above the flat screen, and means forlifting the graded material and discharging it directly into said axialoutlet.

A grader and separator comprising, an inclined rotary screen having acentrally arranged outlet, a hinged valve therefor, and a bucket pivotedwithin the screen or sieve to swing at its outer end toward and from therim of the sieve and at the inner end into and out of register with therear wall of said outlet and a link connecting the inner end of thebucket with the adjacent free end or edge of said valve for the purposedescribed.

5. A grader or separator comprising, an inclined rotary screen having acentrally arranged outlet, a hinged valve therefor, a bucket pivotedWithin the screen or sieve and operatively connected with said valve, aspring for throwing the bucket into operative position between saidoutlet and the rim of the screen, and a finger released catch forholding the bucket in its inoperative position as described.

6. A grader and separator comprising, an inclined rotary cylindricalscreen or sieve having a fiat reticulated bottom, an imperforatecylindrical rim spaced from the cylindrical screen, an imperforatebottom spaced from the reticulated bottom, an outlet from theimperforate bottom, a central tubular outlet for the screen, having anopening in one side, and a manually controlled spring projected bucketand valve controlling said opening.

7. A grader or separator, comprising a plurality of parallel connectedscreens or sieves each having a circular rim, an inner cylindricalscreen having a flat reticulated bottom, and an outer imperforatebottom, a central discharge tube extending through said screens andhaving side openings above the reticulated bottoms, hinged Valves forsaid openings, a spring operated rock shaft extending through bothscreens, discharge buckets or gates mounted on said shaft andoperatively connected at their inner ends to said valves, and means forsetting and releasing said rock shaft.

8. A. grader or separator comprising, a base having an inclined spindleor shaft at its upper end, a plurality of pins or fingers projecting upfrom the top of the base and spaced from the lower end of said spindleor shaft, a rotary fiat screen having a central axis mounted on saidspindle or shaft and a central discharge tube surrrounding said axis andextending down between said pins or fingers. I

9. A grader or separator, comprising a base having an inclined spindleor shaft at its upper end, a plurality of parallel connected screenshaving flat reticulated bottoms, cylindrical reticulated sides, circularimperforate outer rims, imperforate bottoms, a central tubular axisengaging said inclined spindle or shaft and a central discharge tubeconcentric with said tubular axis, extending down through the severalscreens and provided with discharge openings, valves pivoted adjacent tosaid openings and manually controlled buckets or gates operativelyconnected to said valves for the purpose described.

SYLVESTER MARSHALL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

